John gdlice baker



JGHN GULICK BAKER., OF, PHILADELPHIA, PENNSYLVANIA-.

Letters Patent No. 104,537,17atcd .fune 21, 1870.

IMPROVEMENT m .GRINDING-MILLs.

The Schedule referred to in'thene Letters Patent and making pari: of the same.

I, JOHN GULrcK BAKER, of Philadelphia, county of Philadelphia, State of Pennsylvania, haveinvented'V an Improved Grinding-Mill, of which the following is a specification.`

Nature and Object of the Invention. My-invention consists of a-grinding-mill, especially adapted for use by grocers, Ste.; owing to tbesimplicity of its construction,'portable character, cheapuess and steadiness while in operation, my improvedl mill possessing many importantfeaturcs which are appli. cable to mills generally, and which are too fully de-v scribed hereafter to need preliminary explanation.

Descr-@jatten of the Accompanying Drau-mg. Fighlre 1 is a vertical section of my improved grind lng-m1 Figure 2, a plan view on the line 1-2, fig. 1, show' ing the scraper; l Figure 3, a vertical section, illustrating a modification of` part of my invention; and Figures 4 and 5, detached sectional views of partsof the mill.

General Description.

The standard or i'ame of the mill consists of-a hollow column, A, Screwed orotherwise secured tothe hollow base B, the upper end of the column consist ing of an open iiame, composed of 'two arms, a and a, which are, in the present'instance, of the curved form represented in fig. 1, but which maybe modified in shape without departing from the main features of my invention, these two arms termiuatingjin' a circulai` face-platee, to which is secured the Shell F ofthe p mill.

' V'.Ihis shell consists of thelower annular portionh, the hollow projection h', having a cone-shaped interior, and the horizontal portion-fi, on the under l.side of which are formed tine grinding-teeth;

The shell` of the mill, best observed in the detached l view, Figure 5, consists of the centralhub b, the disk bl having fine, grinding-tecthon its upper surface, and having a strengthening-rib, b, below. The upper bearing of the shaft .H isin a hub, d, projecting downward from the face-plate c, an'd above the faceplate is an annular projection, c, concentric with the shaft, and penetrated by an annular projection, e', .on the under side of lthe face-plate. Not only is ground matter thus prevented from entering the bearing, but a, permanent receptacle for oil is adorded, as will be readily understood on reference to fig. 5.

0n the tace-plate c rests the scraper or distributor E, fig. 2, which consists of any desired number of arms, f, projecting from la ring, so adaptedto the -tbovemeutioned annular projection c that it can be turned fi'ccly thereon by a projection on the under side of. the'lever coming in contact with a projectiom 7,-ou the scraper. p There is inthe facc-plat`e c an elongated hole, k, partly. across which the armsof the scraper must-r volve, and which communicates with an inclined spout, rIhe hopper Gr consists of a light disk-shaped casting, having at a: a neck, so constructed that it' will, in the interior, bc in contact with .the upper edge of theportion hof the bur, therebygiving a proper direction i to the material to be ground, the' vbase y oi'uthe i1op per being so formed as to inclose the shell ofthe mili, .and to rest on the edgeV of the face-platt` Motion is communicated to the shaft H by means of a handled shaft, G, which revolves in a projection, a?, on'the-fame-work, this shaft being provided with a bevel-wheel, I, gearing into a similar wheel, I', on

- the vertical shaft H.

The shaft G may be, if desired, and in mills of the' larger class is furnished with a driving-pulley, instead of a handle.

The shaft H turns below in the base-plate, within which it is ,furnished with a.iy\vhcel, K', the shaft resting on a lever, J, one end'of which rests in a pocket, m, insideth'c base-plate, the other end bigag supported by a bolt` and thumb-nut, n, as clearly shown in fig. 1.

The lever J is dished in the middle, so as to form a receptacle for such .oilas may drop from theA lower bearing of the shaft H, the supply of oil in the disbcd lever thus serving as aconstant lubricant for the loweig;1

end of the said shaft H.

K is a horizontal plate, fitted snugly to the column, and connected thereto by means of a lip, I, which pro jects through a slot in the column, the under side of' the lip being recessed, so as to embrace the lower edge of the slot, a flange, l', below the plate,`bearing against the column, and serving to steady and mailltain the plate in a-horizontal position. It will be seen that this plate can be readily detached after slightly elevating it, and that no expensive fastenings arc used for securing it tothe column.

There -is in the column an opening, g, through which the lower bearing of .the vertical shaft H can be readily oiled. l

In themodiication illustrated in fig. 3, th e :bnr is not bolted to thc face-plate c. of the column, but to the under side of thc horizontal portion of the hoppeis base, the annular portion h of the shell being thus dispensed with.

In order that the material may be retained within range ofthe scraper, I employ in this modification an inclined shield, X, which may also bc secured to the hopper.

reduced to a proper crushed condition. v

As the ground material leaves the' lower grindingsmfaces, it falls on the face-plate, andv is directed, by

the scraper E, into the spout k', from which it falls into 'any suitable vessel placed on the plate'K.

The main object of my invention has been to provide grocers and others with a cheap and effective portable mill for grinding coee, Src., although there are features which could be applied with advantage to mills of a large class. Among these features may be mentioned' that of arranging the ily-wheel of the bnrs shaft horizontally and near the ground, and inclosing the ily-wheel in the base of a. columnwhich incloses the shaft and supports the shell, bur, hopper, and driving-gear. It will be evident that, by this arrangement, stcadiness and stability, as well as genera'l compactness of parts, are insured, and economy,

as regardsconstruetion, attained.

Ample opportunities are afforded for the' detachment and replacing of the same parts. In removing the hopper, for instance, access is at once had to the shell and bur, and both of these can be readily removed and replaced.

C laims.

1. A grinding-mili, supported on acolumn or frame, in thc base of which is ahorzontal ily or balancewheel on a shaft secured to the bur or grinder, all substantially as sct forth. 5

2. The column A, having a Hat face, c, at the top, in combination with a bur, F, secured to the column above the face c, as described.

3. The combination of the vertical shaft H, recessed face-plate c, and bur, with its annular projection e'ex tending downward into the said recess.

4. The combination of the said thee-plate c, scraper E, revolving in contact withthe face-plate, and spout 5. The combination of the frame or column A of a grindngmill,and a plate or shelf, K, arranged, in respect to the discharging-spout K', substantially as described.

'6.' The levend', for supporting the shaft J, dished, as described, ii. combination with devices, substantially as set forth, for elevating and depressing the said lever.

In testimony whereof I have sig-ned my name to this specification in the presence of two subscribing witnesses.

JOHN GULIOK BAKER.

Witnesses:

J. M. Oo'LGAN, Louis BoswELn. 

